Just received a courtesy card today in a Fedex package along with a bathrobe. I was very surprised since I read on FT that these cards were only given to hotel owners or friends of the Pritzkers.
I'm not sure how I've qualified for it but I have been a diamond member for 5 years with about anywhere between 90 and 110 nights a year at hyatts primarily in Park Hyatt or Grand Hyatt in Asia. The welcome letter said that it was by invitation only and renewal was subject to an annual review.
The card is good until 2/12 so I'll have plenty occasions to try it out!